--- tools/gn/bootstrap/bootstrap.py.orig
+++ tools/gn/bootstrap/bootstrap.py
@@ -184,7 +184,7 @@
       {'ENABLE_MUTEX_PRIORITY_INHERITANCE': 'false'})
 
   write_buildflag_header_manually(root_gen_dir, 'base/allocator/buildflags.h',
-      {'USE_ALLOCATOR_SHIM': 'true' if is_linux else 'false'})
+      {'USE_ALLOCATOR_SHIM': 'false' })
 
   write_buildflag_header_manually(root_gen_dir,
                                   'base/debug/debugging_buildflags.h',
@@ -438,8 +438,6 @@
       'base/third_party/superfasthash/superfasthash.c',
   ])
   static_libraries['base']['sources'].extend([
-      'base/allocator/allocator_check.cc',
-      'base/allocator/allocator_extension.cc',
       'base/at_exit.cc',
       'base/base_paths.cc',
       'base/base_switches.cc',
@@ -641,26 +639,6 @@
         'base/time/time_conversion_posix.cc',
         'base/trace_event/heap_profiler_allocation_register_posix.cc',
     ])
-    static_libraries['libevent'] = {
-        'sources': [
-            'base/third_party/libevent/buffer.c',
-            'base/third_party/libevent/evbuffer.c',
-            'base/third_party/libevent/evdns.c',
-            'base/third_party/libevent/event.c',
-            'base/third_party/libevent/event_tagging.c',
-            'base/third_party/libevent/evrpc.c',
-            'base/third_party/libevent/evutil.c',
-            'base/third_party/libevent/http.c',
-            'base/third_party/libevent/log.c',
-            'base/third_party/libevent/poll.c',
-            'base/third_party/libevent/select.c',
-            'base/third_party/libevent/signal.c',
-            'base/third_party/libevent/strlcpy.c',
-        ],
-        'tool': 'cc',
-        'include_dirs': [],
-        'cflags': cflags + ['-DHAVE_CONFIG_H'],
-    }
 
   if is_linux or is_aix:
     static_libraries['xdg_user_dirs'] = {
@@ -767,17 +745,7 @@
               '-D_LIBCXXABI_NO_EXCEPTIONS',
           ]
       }
-      static_libraries['base']['sources'].extend([
-        'base/allocator/allocator_shim.cc',
-        'base/allocator/allocator_shim_default_dispatch_to_glibc.cc',
-      ])
-      libs.extend(['-lrt', '-latomic'])
-      static_libraries['libevent']['include_dirs'].extend([
-          os.path.join(SRC_ROOT, 'base', 'third_party', 'libevent', 'linux')
-      ])
-      static_libraries['libevent']['sources'].extend([
-         'base/third_party/libevent/epoll.c',
-      ])
+      libs.extend(['-lrt', '-levent'])
     else:
       ldflags.extend(['-pthread'])
       libs.extend(['-lrt'])
--- base/message_loop/message_pump_libevent.cc.orig
+++ base/message_loop/message_pump_libevent.cc
@@ -14,7 +14,7 @@
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
-#include "base/third_party/libevent/event.h"
+#include "event.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"